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Good Day,
I have a 2006 Jinma 354 with a 485 engine. I live in Alberta and have always kept this tractor inside the garage in the winter. Its been sitting outside for 4months, its starts no problem, when I give it throttle it starts spewing black smoke and the engine sounds like it wants to die. If I use the hydraulics and lift the bucket, again no problem but if I put it down it spews black smoke and wants to die. Thought maybe there was an issue with the fuel, drained it, pulled off the sediment bowl and checked the two filters, the one inside the tank and the one at the top of the sediment bowl, blew out all the lines, hooked it all back up, bought new diesel, fueled her up and again same issue. Removed the air line thinking that there might be an obstruction, still can’t throttle up. Removed the muffler, again, still can’t throttle up but idles fine. I’ve cracked open the fuel line on each one the injectors and they all had pressure, but each time I did it the engine reved up a bit. Started her cold and checked the 4 cylinder walls and they all warmed up to the same temperature (checked it by touch). I tried manually increasing the rpm at the injector pump, had some success, but I had to increase the rpm very, very, very slowly to get it to full Throttle which almost took two minutes to do, but again when I applied some load it begin to die. Any suggestions? Thinking its either the timing or the fuel pump?
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black smoke indicates a rich fuel condition or to little intake air and unless there has been engine work the timing would not change but I am wondering if the hydros are loading the engine, maybe you could pipe around your bucket control valves as a test? ,people have had issues with some controls valves sticking and creating a deadheading issue which is can take out the hydro pump . This has been covered in the past, take a look thru old chats maybe you will find something.
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I figured as much concerning the rich fuel condition or too little intake air, that's why as I wrote in the original post that I had cleaned out the fuel lines and removed the intake air system & exhaust system, thinking this would resolve the issue, it didn't. I've removed the FEL from the tractor so that I can work on it, I have noticed a distinct diesel smell from the oil in the injector pump, also the oil seems to have an almost watery/diesel feel to it. Not sure how diesel would get into the oil of the injector pump, changed the oil, but still wont throttle up. Also, I failed to mention in the earlier post that on start up it idles rough more so than usual until it warms up. I believe you are correct concerning the hydro's but I need to fix the engine issue first before tackling the possible hydro issue. I'm leaning toward the fuel pump being the issue but also wondering if it is an injector problem due to the possible diesel in the oil? Any ideas before I start ripping and tearing it apart?
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from what I understand these pumps are not able to be rebuilt because no parts are available so a new injection pump has to be placed on the tractor. Now with that said. I do not know what engine you have but some have a oil line that supply's engine oil to the injector pump ,they do not have a captive oil reservoir. So if you was to have one of those your engine oil would be thin and smell like diesel also. I have read on this forum about people having a oil and fuel mixing problem with these pumps, usually the tractor runs ok but a fuel, oil mix comes out of the pump vent or is noticed when changing pump oil.
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If there's diesel in your injector pump oil that usually is a sign that your pump is going out… Although your problem does sound a bit strange. Diesels only need air and fuel and compression to run. Sounds like you've got more then enough fuel. Will be interested to see what the problem is.
Trevor Nystrom
Keno Tractors
866-363-8193
Tyler Nystrom
Keno Tractors
parts@kenotractors.com
866-363-8193
Phone hours: M-F 8am to 5:30pm PST Sat 9am to 1pm PST -
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Sounds to me as if your fuel injection pump is dirty – maybe rust inside. Try working the fuel rack plunger back and forth by hand for a good while. It might be something like it is gummed up with varnish ? Try putting some fuel treatment into the fuel before you run it again. I also suspect that the governor is possibly sticking.
You should drain all the old oil and diesel out of the injector pump and refill with new engine oil or similar.
Let us know how you made out please.
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Problem still not solved, but partially resolved. After looking up the issue on line, it was mentioned that it could possibly be air getting into the suction side of the fuel line so I tightened up everything without no avail. But I did find a loose screw on the injector pump that when loosened further fuel begin to shoot out (tractor running), so I tightened her up and now its better but not 100% yet, its got a lag but it does slowly throttle up, but still doesn't have the power it did before. I read in another post somewhere that the fuel lines could be detouriated inside from sitting so long, could I be sucking air through a bad line? and could anyone tell me where I can get replacement fuel lines for this 4 cylinder diesel?
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If that is the case i can get the fuel lines for you. Just give me a call. or email me, trevor@kenotractors.com
Trevor Nystrom
Keno Tractors
Parts Department
541-850-8193
866-363-8193
Tyler Nystrom
Keno Tractors
parts@kenotractors.com
866-363-8193
Phone hours: M-F 8am to 5:30pm PST Sat 9am to 1pm PST -
We should have just about any part you need on the shelf, let us know if we can help
Tommy
Affordable Tractor Sales
“Your Jinma Parts Superstore”
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Thanks for everybody's input, ran a tank and a half of diesel with added conditioner through it and she seems to be running like it use to. Found out that apparently the fuel cap was sitting on the hood of the tractor and the tank was wide open to the elements, which makes sense cause I could have sworn that I had 3/4 of a tank when I parked it. Guess someone else needed my fuel more than I did, could have at least put the cap back on after stealing the fuel. Wonder if they make a lockable fuel cap for this tractor, anyhow she's running good now.
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